The Howe and Webster farms adjoined, lying on a sun-flooded, gently sloping New Hampshire hillside. Between them loomed The Wall. It was not a high wall. On the contrary, its formidableness was the result of tradition rather than of fact. For more than a century it had been an estranging barrier to neighborliness, to courtesy, to broad-mindedness; a barrier to friendship, to Christian charity, to peace.